Finding the Fourth Proportional to 31,043.87, 42,840.72 and 16,896.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,043.87 : 42,840.72 = 16,896.86 : x
2. Step 2: Convert to fraction form
   31,043.87/42,840.72 = 16,896.86/x
3. Step 3: Cross multiply
   31,043.87x = 42,840.72 × 16,896.86
4. Step 4: Simplify right side
   31,043.87x = 723,873,433.94
5. Step 5: Solve for x
   x = 723,873,433.94/31,043.87
6. Step 6: Final answer
   x = 23,317.76